Parametric cup name tag

Ever have a dinner party where you don't want to roll with the Dixie + Sharpie? Your guests invariably get their cups all mixed up, and just create extra work for the dishwasher (you).

I came up with a simple idea, which is to make a ring with an embossed section for the name. My first attempt was just the ring and I wrote my name in sharpie. The improved version was inspired by Tony Buser's Parametric Name Tag (http://www.thingiverse.com/thing:2055). However, I wanted to use a specific t